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					Computational Photography and
        Videography

  Christian Theobalt and Ivo Ihrke
          Winter term 09/10
Coordinates
 MPI – room 019
 Wednesdays, 14:00 c.t.
 Christian Theobalt
   – MPI, room 228
   – theobalt@mpii.de
 Ivo Ihrke
   – MPI, room 225
   – ihrke@mpii.de
 Mailing List
   – seminar-cpav09@mpi-inf.mpg.de
 Web Page
   – http://www.mpi-inf.mpg.de/~theobalt/courses/Seminar_WS_2009/


                                             CPAV 09/10 – First Meeting – 2009/10/23
Formal Requirements
 Presence required
 Read all papers and participate in discussion
 One paper is “your paper” and you have to give
  a 40-45 minute presentation on it
 Prepare a written report on the topic you
  presented
 Grade: talk 50 %, report 50 %




                            CPAV 09/10 – First Meeting – 2009/10/23
Organizational Issues
 Register by sending an Email to both of us
 Topic assignment
   – Send list of ordered preferences by Friday (23rd of Oct.)
   – We try to accommodate wishes as well as possible
   – We send out assignment on Monday, 26th of Oct.


 First topic presentation 2009/11/18
   – (10 students)




                                        CPAV 09/10 – First Meeting – 2009/10/23
Benefits
 Practice one of the most important skills in
  science
   – Read and understand papers
   – Present scientific results
 Discussion is essential
   – If you don’t participate you miss a big chance
   – Most ideas are developed in discussions
     about other papers
   Prepare the seminar classes !
   Benefit from the interaction in the group !


                                  CPAV 09/10 – First Meeting – 2009/10/23
Organizational Issues
 Topics will be covered in the order appearing on
  the seminar web page
      If necessary, and mutually agreed on, dates can be
       exchanged


 Presentations
        45 min.
        presenter leads the discussion on the papers
        All participants are supposed to read the papers
        Active participation in discussion is expected



                                     CPAV 09/10 – First Meeting – 2009/10/23
Organizational Issues
 Two scheduled meetings per topic
  – 1. 3 weeks prior to presentation
      Read papers for this meeting
      Ask questions if you have difficulties
      Discuss plans for presentation
  – 2. 1 week prior to presentation
      prepare a preliminary presentation
      We can provide feedback




                                    CPAV 09/10 – First Meeting – 2009/10/23
Organizational Issues
 one office hour per week
  – Announced on seminar web page
 You can ask questions by e-mail any time




                             CPAV 09/10 – First Meeting – 2009/10/23
Organizational Issues
 Report
  – 6 – 8 pages summary of major ideas of your topic
  – 2 - 3 pages with your own ideas, e.g.,
      Discuss limitations not mentioned in the paper
       and sketch a solution
      Try to suggest improvements
      Novel ideas based on content described in the papers
      Your ideas can be the result of the discussion after
       your presentation !

  – The idea is that you get a feeling for your specific
    topic surpassing the level of simply understanding a
    paper.

                                  CPAV 09/10 – First Meeting – 2009/10/23
Organizational Issues
 Report
  –   Due date 2010/02/19 (2 1/2 weeks after last seminar)
  –   Pdf by e-mail
  –   We provide a LaTeX-style on the seminar page
  –   If you use other software make it look like the LaTeX-
      example




                                   CPAV 09/10 – First Meeting – 2009/10/23
Image-Based Rendering Concepts




 Adelson & Bergen: The plenoptic function and elements
  of early vision, Computational Models of Visual
  Processing 1991
 Levoy & Hanrahan: Light Field Rendering,
  SIGGRAPH’96
                                CPAV 09/10 – First Meeting – 2009/10/23
Camera Models and Noise




 Healy & Kondepudy: Radiometric CCD
  Calibration and Noise Estimation, PAMI 1994
 Kolb et al.: A Realistic Camera Model for
  Computer Graphics, SIGGRAPH 1995
                           CPAV 09/10 – First Meeting – 2009/10/23
Geometric Camera Calibration




 Zhang: A flexible new technique for camera
  calibration, PAMI 2000
 Hartley & Zisserman, Multiple View Geometry in
  Computer Vision, chapter 5, Cambridge
  University Press, 2000
                            CPAV 09/10 – First Meeting – 2009/10/23
Fourier Analysis of Light Fields




 Isaksen et al.: Dynamically Reparameterized
  Light Fields, SIGGRAPH 2000
 Ng: Fourier Slice Photography, SIGGRAPH
  2005
                              CPAV 09/10 – First Meeting – 2009/10/23
Light Field Capture with Non-Refractive
Modulators




 Veeraraghavan et al: Dappled Photography: Mask-
  Enhanced Cameras for Heterodyned Light Fields and
  Coded Aperture Refocusing, SIGGRAPH 2007
 Lanman et al: Shield Fields: Modeling and Capturing 3D
  Occluders, SIGGRAPH Asia 2008


                                CPAV 09/10 – First Meeting – 2009/10/23
Multi-View Basics




 Laurentini: The Visual Hull Concept for Silhouette-Based
  Image Understanding, PAMI 1994
 Matusik et al.: Image-Based Visual Hulls, SIGGRAPH
  2000

                                 CPAV 09/10 – First Meeting – 2009/10/23
Multi-view Stereo for Static and
Dynamic Scenes




 Furukawa et al., Accurate, Dense, and Robust Multi-view
  Stereopsis , CVPR 2007
 Zitnick et al., High-Quality Video View Interpolation
  Using a Layered Representation, SIGGRAPH 2004

                                CPAV 09/10 – First Meeting – 2009/10/23
Marker-less Motion Capture




 Bregler et al., tracking people with twists and exponential
  maps, CVPR 1998
 Balan et al., detailed human shape and pose
  from images

                                   CPAV 09/10 – First Meeting – 2009/10/23
Marker-less Performance Capture




 Vlasic et al., Articulated Mesh Animation from Multi-view
  Silhouettes, SIGGRAPH 2008
 De Aguiar et al., Performance Capture from Sparse
  Multi-view Video, SIGGRAPH 2008

                                  CPAV 09/10 – First Meeting – 2009/10/23
Video Recinematography




 Gleicher et al., Re-Cinematography: Improving the Camerawork of
  Casual Video, ACM TOMCCAP
 Feng Liu et al., Content-Preserving Warps for 3D Video
  Stabilization, SIGGRAPH 2009

                                      CPAV 09/10 – First Meeting – 2009/10/23
Reconstruction from Community Photo
Collections




 Snavely et al., Photo Tourism: Exploring image
  collections in 3D, SIGGRAPH 2006
 Goesele et al., Multi-View Stereo for Community
  Photo Collections, ICCV 2008
                            CPAV 09/10 – First Meeting – 2009/10/23
Reconstruction with Time-of-Flight
Cameras




 Fusion of Time-of-Flight Depth and Stereo for High Accuracy Depth
  Maps (PDF), Jiejie Zhu, Liang Wang, Ruigang Yang and James
  Davis, CVPR 2008
 Hebert et al., 3d measurements from imaging laser radars: How
  good are they?, IVC 1992


                                       CPAV 09/10 – First Meeting – 2009/10/23

				
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